john here. talk about your organization and what's happene over the past 25 years. >> it started with explosion of homeless people in -- not a literal explosion but homeless people in new york city in the late '8 the doctor and i met because i was trying to get some money from usa for africa, the michael jackson video that i was in to give it to a homeless shelter on the westid o manhattan. and his interest is children's health care, pediatrics and we went around the city and saw the single room occupancy hels and in w homelessness and w i affected children. it was honestly like the third world. it was just mortifying. and so we came up with this idea to have a mobile medical clinic that would go the vus sites and provide health care with a doctor and a nurse on board and a computer records and we were associated with a hospital in new york and that's how we began. we startedn manhattan and tn wt to a few other boroughs and now we have 50 units all around the united states in urban areas and in